WO2017023125A1 - Composé organique photoémetteur et dispositif électroluminescent organique l'utilisant - Google Patents

Composé organique photoémetteur et dispositif électroluminescent organique l'utilisant Download PDF

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WO2017023125A1
WO2017023125A1 PCT/KR2016/008581 KR2016008581W WO2017023125A1 WO 2017023125 A1 WO2017023125 A1 WO 2017023125A1 KR 2016008581 W KR2016008581 W KR 2016008581W WO 2017023125 A1 WO2017023125 A1 WO 2017023125A1
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김충한
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주식회사 두산
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
    • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
    • C07D487/04—Ortho-condensed systems
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D209/56—Ring systems containing three or more rings
    • C07D209/80—[b, c]- or [b, d]-condensed
    • C07D209/82—Carbazoles; Hydrogenated carbazoles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing three or more hetero rings
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    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • H—ELECTRICITY
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    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/615—Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
    • H10K85/633—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/631—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
    • H10K85/636—Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/654—Aromatic compounds comprising a hetero atom comprising only nitrogen as heteroatom
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/657—Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6572—Polycyclic condensed heteroaromatic hydrocarbons comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14—Carrier transporting layers
    • H10K50/15—Hole transporting layers

Definitions

  • the present invention relates to a novel organic light emitting compound and an organic electroluminescent device using the same, and more particularly, a novel carbazole compound having excellent hole injection and transporting ability, light emitting ability, and the like, in the at least one organic material layer,
  • the present invention relates to an organic electroluminescent device having improved characteristics such as driving voltage and lifetime.
  • organic electroluminescent (EL) devices led to blue electroluminescence using anthracene single crystals in 1965, based on observation of Bernanose organic thin film emission in the 1950s.
  • the organic electroluminescent device of the laminated structure divided into the functional layer of a positive hole layer and a light emitting layer was proposed. Since then, in order to make a high efficiency and long-life organic electroluminescent device, it has been developed in the form of introducing each characteristic organic material layer in the device, leading to the development of specialized materials used therein.
  • the material used as the organic material layer may be classified into a light emitting material, a hole injection material, a hole transport material, an electron transport material, an electron injection material and the like according to its function.
  • the light emitting layer forming material of the organic EL device may be classified into blue, green, and red light emitting materials according to light emission colors. In addition, yellow and orange light emitting materials are also used as light emitting materials for realizing a better natural color.
  • a host / dopant system may be used as the light emitting material in order to increase the light emission efficiency through increase in color purity and energy transfer.
  • the dopant material may be divided into a fluorescent dopant using an organic material and a phosphorescent dopant using a metal complex compound containing heavy atoms such as Ir and Pt. The development of such phosphorescent materials can theoretically improve luminous efficiency up to 4 times compared to fluorescence, and thus, attention is focused on phosphorescent dopants as well as phosphorescent host materials.
  • NPB hole blocking layer
  • BCP hole blocking layer
  • Alq 3 hole blocking layer
  • anthracene derivatives have been reported as fluorescent dopant / host materials in the light emitting material.
  • phosphorescent materials having great advantages in terms of efficiency improvement among light emitting materials include metal complex compounds containing Ir such as Firpic, Ir (ppy) 3 , and (acac) Ir (btp) 2, such as blue, green, and red dopant materials. Is being used.
  • CBP has shown excellent properties as a phosphorescent host material.
  • the present invention can be applied to an organic electroluminescent device, and an object of the present invention is to provide a novel organic compound having excellent hole injection, transporting ability, light emitting ability, and the like.
  • Another object of the present invention is to provide an organic electroluminescent device including the novel organic compound, which exhibits low driving voltage and high luminous efficiency and improves characteristics such as lifetime.
  • At least one of R 1 and R 2 , R 2 and R 3, and R 3 and R 4 is condensed with the ring represented by Formula 2 to form a condensed ring;
  • the dotted line is the part where condensation takes place
  • X 1 and X 2 are each independently selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 ), wherein X 2 Are plural, they are the same or different from each other;
  • a 1 to A 4 are each independently N or C (R 5 );
  • R 1 to R 4 which do not form a condensed ring with the ring represented by Formula 2;
  • R 5 is hydrogen, deuterium, halogen, cyano group, nitro group, C 1 -C 40 alkyl group, C 2 -C 40 alkenyl group, C 2 -C 40 alkynyl group, C 3 -C 40 cycloalkyl group, 3 to 40 heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups , C 3 ⁇ C 40 Alkylsilyl group, C 6 ⁇ C 60 Arylsilyl group, C 1 ⁇ C 40 Alkyl boron group, C 6 ⁇ C 60 Aryl boron group, C 6 ⁇ C 60 Aryl boron group, C 6 ⁇ C 60 Aryl phosphine group , C 6 ⁇ C 60 dimono or diaryl phosphinyl group and
  • Ar 1 to Ar 6 are each independently C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 3 ⁇ C 40 Cycloalkyl group, 3 to 40 nuclear atoms Heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups, C 3 to C 40 Alkyl silyl group, C 6 ⁇ C 60 aryl silyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphine group, C 6 ⁇ C 60 Mono or diaryl phosphinyl group and C 6 ⁇ C 60 It is selected from the group consisting of arylamine group, Ar 1 to Ar 6 When each is plural, they are the same as or different from each other;
  • the alkyl group, cycloalkyl group, heterocycloalkyl group, aryl group, heteroaryl group, alkyloxy group, aryloxy group, alkylsilyl group, arylsilyl group, alkyl boron group, aryl of R 1 to R 5 and Ar 1 to Ar 6 boron group, an aryl phosphine group, a mono- or diaryl phosphine blood group and the arylamine groups are each independently, C 1 ⁇ alkynyl group of C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 of, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear atoms of 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, C 1 ⁇ alkyloxy group of C 40, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40
  • the present invention also provides an organic electroluminescent device comprising (i) an anode, (ii) a cathode, and (iii) at least one organic layer interposed between the anode and the cathode, wherein at least one of the at least one organic layer
  • an organic electroluminescent device comprising a compound represented by the formula (1).
  • Alkyl as used herein means a monovalent substituent derived from a straight or branched chain saturated hydrocarbon of 1 to 40 carbon atoms. Examples thereof include, but are not limited to, methyl, ethyl, propyl, isobutyl, sec-butyl, pentyl, iso-amyl, hexyl and the like.
  • alkenyl refers to a monovalent substituent derived from a straight or branched chain unsaturated hydrocarbon having 2 to 40 carbon atoms having at least one carbon-carbon double bond. Examples thereof include, but are not limited to, vinyl, allyl, isopropenyl, 2-butenyl, and the like.
  • alkynyl refers to a monovalent substituent derived from a straight or branched chain unsaturated hydrocarbon having 2 to 40 carbon atoms having at least one carbon-carbon triple bond. Examples thereof include, but are not limited to, ethynyl, 2-propynyl, and the like.
  • Aryl in the present invention means a monovalent substituent derived from an aromatic hydrocarbon having 6 to 60 carbon atoms combined with a single ring or two or more rings.
  • monovalent having two or more rings condensed with each other, containing only carbon as a ring forming atom (for example, may have 8 to 60 carbon atoms), and the whole molecule has non-aromacity Substituents may also be included. Examples of such aryl include, but are not limited to, phenyl, naphthyl, phenanthryl, anthryl, fluorenyl, and the like.
  • Heteroaryl as used herein means a monovalent substituent derived from a monoheterocyclic or polyheterocyclic aromatic hydrocarbon having 5 to 60 nuclear atoms. At least one carbon in the ring, preferably 1 to 3 carbons, is substituted with a heteroatom such as N, O, S or Se. In addition, two or more rings are simply pendant or condensed with each other, and in addition to carbon as a ring forming atom, a hetero atom selected from N, O, P, S and Se, the entire molecule is non-aromatic (non- It is also interpreted to include monovalent groups having aromacity).
  • heteroaryl examples include 6-membered monocyclic rings such as pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, phenoxathienyl, indolinzinyl, indolyl ( polycyclic rings such as indolyl, purinyl, quinolyl, benzothiazole, carbazolyl and 2-furanyl, N-imidazolyl, 2-isoxazolyl , 2-pyridinyl, 2-pyrimidinyl, and the like, but are not limited thereto.
  • 6-membered monocyclic rings such as pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, phenoxathienyl, indolinzinyl, indolyl ( polycyclic rings such as indolyl, purinyl, quinolyl, benzothiazole, carb
  • aryloxy is a monovalent substituent represented by RO-, wherein R means aryl having 5 to 60 carbon atoms.
  • R means aryl having 5 to 60 carbon atoms. Examples of such aryloxy include, but are not limited to, phenyloxy, naphthyloxy, diphenyloxy, and the like.
  • alkyloxy is a monovalent substituent represented by R'O-, wherein R 'means an alkyl having 1 to 40 carbon atoms, and linear, branched or cyclic structure It may include.
  • alkyloxy include, but are not limited to, methoxy, ethoxy, n-propoxy, 1-propoxy, t-butoxy, n-butoxy, pentoxy and the like.
  • Arylamine in the present invention means an amine substituted with aryl having 6 to 60 carbon atoms.
  • cycloalkyl is meant herein monovalent substituents derived from monocyclic or polycyclic non-aromatic hydrocarbons having 3 to 40 carbon atoms.
  • examples of such cycloalkyl include, but are not limited to, cyclopropyl, cyclopentyl, cyclohexyl, norbornyl, adamantine, and the like.
  • Heterocycloalkyl as used herein means a monovalent substituent derived from 3 to 40 non-aromatic hydrocarbons of nuclear atoms, wherein at least one carbon in the ring, preferably 1 to 3 carbons, is N, O, S Or a hetero atom such as Se.
  • heterocycloalkyl include, but are not limited to, morpholine, piperazine, and the like.
  • alkylsilyl means silyl substituted with alkyl having 1 to 40 carbon atoms
  • arylsilyl means silyl substituted with aryl having 5 to 60 carbon atoms.
  • condensed ring means a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring, a condensed heteroaromatic ring, or a combination thereof.
  • the compound represented by Formula 1 of the present invention may be used as a material of the organic material layer of the organic electroluminescent device because of its excellent thermal stability and luminescence properties.
  • an organic electroluminescent device having excellent light emission performance, low driving voltage, high efficiency, and long life compared to a conventional host material can be manufactured. Full color display panels with improved performance and lifetime can also be manufactured.
  • the present invention provides a compound represented by Formula 1:
  • At least one of R 1 and R 2 , R 2 and R 3, and R 3 and R 4 is condensed with the ring represented by Formula 2 to form a condensed ring;
  • the dotted line is the part where condensation takes place
  • X 1 and X 2 are each independently selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 ), wherein X 2 Are plural, they are the same or different from each other;
  • a 1 to A 4 are each independently N or C (R 5 );
  • R 1 to R 4 which do not form a condensed ring with the ring represented by Formula 2;
  • R 5 is hydrogen, deuterium, halogen, cyano group, nitro group, C 1 -C 40 alkyl group, C 2 -C 40 alkenyl group, C 2 -C 40 alkynyl group, C 3 -C 40 cycloalkyl group, 3 to 40 heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups , C 3 ⁇ C 40 Alkylsilyl group, C 6 ⁇ C 60 Arylsilyl group, C 1 ⁇ C 40 Alkyl boron group, C 6 ⁇ C 60 Aryl boron group, C 6 ⁇ C 60 Aryl boron group, C 6 ⁇ C 60 Aryl phosphine group , C 6 ⁇ C 60 dimono or diaryl phosphinyl group and
  • Ar 1 to Ar 6 are each independently C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 3 ⁇ C 40 Cycloalkyl group, 3 to 40 nuclear atoms Heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups, C 3 to C 40 Alkyl silyl group, C 6 ⁇ C 60 aryl silyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphine group, C 6 ⁇ C 60 Mono or diaryl phosphinyl group and C 6 ⁇ C 60 It is selected from the group consisting of arylamine group, Ar 1 to Ar 6 When each is plural, they are the same as or different from each other;
  • the alkyl group, cycloalkyl group, heterocycloalkyl group, aryl group, heteroaryl group, alkyloxy group, aryloxy group, alkylsilyl group, arylsilyl group, alkyl boron group, aryl of R 1 to R 5 and Ar 1 to Ar 6 boron group, an aryl phosphine group, a mono- or diaryl phosphine blood group and the arylamine groups are each independently, C 1 ⁇ alkynyl group of C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 of, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear atoms of 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, C 1 ⁇ alkyloxy group of C 40, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40
  • a pyrrole moiety is condensed on the carbazole to form a basic skeleton, and is represented by the following Chemical Formula 1. Since the compound represented by Chemical Formula 1 has a higher molecular weight than the conventional organic electroluminescent device material (for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')), the glass transition temperature is high and thermally Not only is it excellent in stability, it is also excellent in carrier transport ability, light emission ability, etc. Therefore, when the organic electroluminescent device includes the compound of Formula 1, the driving voltage, efficiency, lifespan, etc. of the device may be improved.
  • the conventional organic electroluminescent device material for example, 4,4-dicarbazolylbiphenyl (hereinafter referred to as 'CBP')
  • the glass transition temperature is high and thermally Not only is it excellent in stability, it is also excellent in carrier transport ability, light emission ability, etc. Therefore, when the organic electroluminescent device includes the compound of Formula 1, the driving voltage, efficiency,
  • At least one of R 1 and R 2 , R 2 and R 3, and R 3 and R 4 is condensed with the ring represented by Formula 2 to form a condensed ring;
  • the dotted line is the part where condensation takes place
  • X 1 and X 2 are each independently selected from the group consisting of O, S, Se, N (Ar 2 ), C (Ar 3 ) (Ar 4 ) and Si (Ar 5 ) (Ar 6 ), wherein X 2 Are plural, they are the same or different from each other;
  • a 1 to A 4 are each independently N or C (R 5 );
  • R 1 to R 4 which do not form a condensed ring with the ring represented by Formula 2;
  • R 5 are each independently hydrogen, deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 3 ⁇ C 40 of the A cycloalkyl group, a nuclear atom having 3 to 40 heterocycloalkyl groups, a C 6 to C 60 aryl group, a nuclear atom having 5 to 60 heteroaryl groups, a C 1 to C 40 alkyloxy group, a C 6 to C 60 group Aryloxy group, C 3 ⁇ C 40 alkylsilyl group, C 6 ⁇ C 60 arylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 An arylphosphine group, a C 6 -C 60 mono
  • Ar 1 to Ar 6 are each independently C 1 ⁇ C 40 Alkyl group, C 2 ⁇ C 40 Alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 3 ⁇ C 40 Cycloalkyl group, 3 to 40 nuclear atoms Heterocycloalkyl groups, C 6 to C 60 aryl groups, 5 to 60 heteroaryl groups, C 1 to C 40 alkyloxy groups, C 6 to C 60 aryloxy groups, C 3 to C 40 Alkyl silyl group, C 6 ⁇ C 60 aryl silyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphine group, C 6 ⁇ C 60 Mono or diaryl phosphinyl group and C 6 ⁇ C 60 It is selected from the group consisting of arylamine group, Ar 1 to Ar 6 When each is plural, they are the same as or different from each other;
  • the alkyl group, cycloalkyl group, heterocycloalkyl group, aryl group, heteroaryl group, alkyloxy group, aryloxy group, alkylsilyl group, arylsilyl group, alkyl boron group, aryl of R 1 to R 5 and Ar 1 to Ar 6 boron group, an aryl phosphine group, a mono- or diaryl phosphine blood group and the arylamine groups are each independently, C 1 ⁇ alkynyl group of C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 of, C 3 ⁇ C 40 cycloalkyl group, a number of nuclear atoms of 3 to 40 heterocycloalkyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, C 1 ⁇ alkyloxy group of C 40, C 6 ⁇ C 60 aryloxy group, C 3 ⁇ C 40
  • the host material should have a triplet energy gap of which is higher than the triplet energy gap of the dopant. That is, when the lowest excited state of the host is higher in energy than the lowest emitted state of the dopant, phosphorescence efficiency may be improved.
  • the compound of Formula 1 has a high triplet energy, by introducing a specific substituent on the basic skeleton condensed with a broad singlet energy level and a high triplet energy level, the energy level can be controlled higher than the dopant It can be used as a host material.
  • the compound of the present invention since the compound of the present invention has a high triplet energy as described above, it is possible to prevent the excitons generated in the light emitting layer from diffusing into the electron transporting layer or the hole transporting layer adjacent to the light emitting layer. Therefore, when the organic material layer (hereinafter, referred to as a 'light emitting auxiliary layer') is formed between the hole transport layer and the light emitting layer by using the compound of Formula 1, the exciton is prevented from being diffused by the compound, and thus the first exciton is diffused. Unlike conventional organic electroluminescent devices that do not include a barrier layer, the number of excitons that substantially contribute to light emission in the light emitting layer may be increased, thereby improving the luminous efficiency of the device.
  • the organic material layer hereinafter, referred to as a 'light emitting auxiliary layer'
  • the compound represented by Chemical Formula 1 may be used as a light emitting auxiliary layer material or a life improvement layer material other than the host of the light emitting layer.
  • the compound of Formula 1 may adjust HOMO and LUMO energy levels according to the type of substituents introduced into the basic skeleton, may have a wide bandgap, it may have a high carrier transport.
  • EWG electron-withdrawing electron
  • the compound is bonded to an electron-withdrawing electron (EWG) having a high electron absorption such as a nitrogen-containing heterocycle (eg, pyridine group, pyrimidine group, triazine group, etc.) to the basic skeleton, Since it has a bipolar characteristic, it is possible to increase the bonding force between the hole and the electron.
  • EWG electron-withdrawing electron
  • the compound of Formula 1 having EWG introduced into the basic skeleton has excellent carrier transport properties and luminescent properties, and thus, as an electron injection / transport layer material or a life improvement layer material, in addition to the light emitting layer material of the organic EL device. Can be used.
  • an electron donor group EWG
  • the hole injection and transport is smooth.
  • it can be usefully used as a hole injection / transport layer or light emitting auxiliary layer material.
  • the compound represented by Chemical Formula 1 may improve the light emission characteristics of the organic EL device, and may also improve the hole injection / transport ability, the electron injection / transport capability, the luminous efficiency, the driving voltage, and the lifespan characteristics.
  • the compound of formula 1 according to the present invention is an organic material layer material of an organic electroluminescent device, preferably a light emitting layer material (blue, green and / or red phosphorescent host material), an electron transport / injection layer material and a hole transport / injection layer It can be used as a material, a light emission auxiliary layer material, a life improvement layer material, more preferably a light emission layer material, an electron injection layer material, a light emission auxiliary layer material, and a life improvement layer material.
  • the compound of Formula 1 has a variety of substituents, particularly aryl groups and / or heteroaryl groups introduced into the basic skeleton significantly increases the molecular weight of the compound, thereby improving the glass transition temperature, thereby the conventional light emission It may have a higher thermal stability than the material (eg CBP).
  • the compound represented by the formula (1) is effective in suppressing the crystallization of the organic material layer. Therefore, the organic electroluminescent device including the compound of Formula 1 according to the present invention can greatly improve performance and lifespan characteristics, and the full-color organic light emitting panel to which the organic electroluminescent device is applied can also maximize its performance.
  • the compound represented by Formula 1 may be a compound represented by any one of the following formula (3) to (5).
  • a 1 to A 4 , Ar 1 , X 1 and X 2 are as defined in Formula 1 and Formula 2.
  • Ar 2 is a substituted or unsubstituted C 6 ⁇ C 60 aryl group or substituted or unsubstituted 5 to 60 heteronuclear atoms It may be an aryl group.
  • Ar 2 is a C 6 ⁇ C 60 aryl group or a nuclear atom of 5 to 60 heteroaryl group
  • the aryl group and heteroaryl group are each independently unsubstituted or substituted with one or more substituents selected from the group consisting of an alkyl group of 1 to 40 carbon atoms, an aryl group of 6 to 60 carbon atoms and a heteroaryl group of 5 to 60 nuclear atoms And, when substituted with a plurality of substituents, they may be the same or different from each other.
  • Ar 2 may be selected from the group consisting of phenyl, biphenyl, pyridazine, fluorene, acridine, imidazole and triazole ,
  • the phenyl, biphenyl, pyridazine, fluorene, acridine, imidazole and triazole are each independently a C 1 ⁇ C 40 alkyl group, C 6 ⁇ C 60 aryl group and 5 to 60 heteroatoms When unsubstituted or substituted with one or more substituents selected from the group consisting of aryl groups, they may be the same or different from each other.
  • Ar 2 may be selected from the group consisting of phenyl, biphenyl, pyridazine, fluorene, acridine, imidazole and triazole ,
  • the phenyl, biphenyl, pyridazine, fluorene, acridine, imidazole and triazole are each independently a methyl group, ethyl group, phenyl group, biphenyl group, triphenylene group, pyrimidinyl group, imidazolyl group.
  • substituents selected from the group consisting of a carbazolyl group and a dibenzothiophenyl group they may be the same as or different from each other.
  • Ar 3 and Ar 4 are each independently substituted or unsubstituted C 1 ⁇ C 40 Alkyl group
  • substituted or unsubstituted C 6 ⁇ C 60 may be an aryl group or a substituted or unsubstituted heteroaryl group having 5 to 60 nuclear atoms, more preferably a substituted or unsubstituted methyl group, a substituted or unsubstituted ethyl group, a substituted or unsubstituted phenyl group, or a substitution Or an unsubstituted biphenyl group.
  • R 5 is a substituted or unsubstituted C 6 ⁇ C 60 aryl group, or substituted or unsubstituted 5 to 60 nuclear atoms It may be a heteroaryl group, more preferably a substituted or unsubstituted phenyl group or a substituted or unsubstituted imidazolyl group.
  • At least one of Ar 1 to Ar 6 may be a substituent represented by the following formula (6) or a phenyl group.
  • L 1 is selected from the group consisting of a single bond, a C 6 ⁇ C 18 arylene group and a nuclear atoms of 5 to 18 groups heteroarylene, preferably a single bond, phenylene group, biphenyl group or a carbazolyl group;
  • Z 1 to Z 5 are each independently N or C (R 6 ), but at least one of Z 1 to Z 5 is N;
  • R 6 is hydrogen, deuterium, halogen, cyano group, nitro group, C 1 -C 40 alkyl group, C 2 -C 40 alkenyl group, C 2 -C 40 alkynyl group, C 6 -C 60 aryl group, 5 to 60 heteroaryl groups, C 6 to C 60 aryloxy groups, C 1 to C 40 alkyloxy groups, C 3 to C 40 cycloalkyl groups, 3 to 40 heterocycloalkyl groups, C 6 ⁇ C 60 arylamine group, C 1 ⁇ C 40 alkylsilyl group, C 1 ⁇ C 40 alkyl boron group, C 6 ⁇ C 60 aryl boron group, C 6 ⁇ C 60 aryl phosphine group, C 6 ⁇ C 60 mono or diaryl phosphinyl group and C 6 ⁇ C 60 arylsilyl group selected from the group consisting of, or in combination with adjacent groups (e.g., L, other adjacent R 6 ) conden
  • the arylene group and heteroarylene group of L 1 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 of the alkynyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, C 6 ⁇ aryloxy C 60, C 1 ⁇ C 40 alkyloxy groups, C 6 to C 60 arylamine groups, C
  • substituent represented by Formula 6 include a substituent represented by the following A-1 to A-15, but is not limited thereto:
  • n is an integer of 0 to 4, and when n is 0, it means that hydrogen is not substituted with a substituent R 7 , and when n is an integer of 1 to 4, R 7 is deuterium, halogen, cyano group, nitro C 1 to C 40 alkyl group, C 2 to C 40 alkenyl group, C 2 to C 40 alkynyl group, C 3 to C 40 cycloalkyl group, nuclear atom of 3 to 40 heterocycloalkyl group, C 6 Aryl group of ⁇ C 60 , heteroaryl group of 5 to 60 nuclear atoms, aryloxy group of C 6 ⁇ C 60 , alkyloxy group of C 1 ⁇ C 40 , arylamine group of C 6 ⁇ C 60 , C 1 C 40 alkyl alkyl group, C 1 -C 40 alkyl boron group, C 6 -C 60 aryl boron group, C 6 -C 60 arylphosphine group, C 6 -C 60 mono or diary
  • the arylphosphine group, mono or diarylphosphinyl group and arylsilyl group are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group, C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 Alkynyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl group, C 6 ⁇ C 60 aryloxy group, C 1 ⁇ C 40 alkyloxy group, C 6 ⁇ C 60 An arylamine group, a C 3 to C 40 cycl
  • L 1 and R 6 are each as defined in Chemical Formula 6.
  • R 6 is a substituted or unsubstituted C 6 ⁇ C 60 aryl group or substituted or unsubstituted 5 to 60 heteronuclear atoms It may be an aryl group, more preferably a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group or a substituted or unsubstituted pyridinyl group.
  • At least one of Ar 1 to Ar 6 may be a substituent represented by the following formula (7).
  • L 2 is a single bond
  • C 6 ⁇ be an aryl group and a nucleus of atoms of C 18 is selected from 5 to 18 heteroarylene group consisting, preferably a single bond, phenylene group, biphenyl group or a carbazolyl group;
  • R 8 and R 9 are each independently a C 1 ⁇ C 40 alkyl group, C 6 ⁇ C 60 aryl group, the number of nuclear atoms of 5 to 60 heteroaryl group, and a C 6 ⁇ selected from the group consisting of an aryl amine of the C 60 Or R 8 and R 9 may combine to form a condensed ring;
  • the arylene group and heteroarylene group of L 2 and the alkyl group, aryl group, heteroaryl group and arylamine group of R 8 and R 9 are each independently deuterium, halogen, cyano group, nitro group, C 1 ⁇ C 40 alkyl group , C 2 ⁇ C 40 alkenyl group, C 2 ⁇ C 40 alkynyl group, C 6 ⁇ C 60 aryl group, 5 to 60 heteroaryl group, C 6 ⁇ C 60 aryloxy group, C 1 to C 40 alkyloxy group, C 6 to C 60 arylamine group, C 3 to C 40 cycloalkyl group, nuclear atom of 3 to 40 heterocycloalkyl group, C 1 to C 40 alkylsilyl group, C 1 ⁇ C 40 group of an alkyl boron, C 6 ⁇ C group 60 arylboronic of, C 6 ⁇ C 60 aryl phosphine group, C 6 ⁇ C 60 mono or diaryl the Phosphinicos
  • R 8 and R 9 are each independently substituted or unsubstituted C 6 ⁇ C 60 aryl group or substituted or unsubstituted nuclear atom It may be from 5 to 60 heteroaryl groups, more preferably a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted naphthalenyl group or a substituted or unsubstituted fluorenyl group. .
  • Compound represented by Formula 1 of the present invention may be represented by the following compounds, but is not limited thereto:
  • the compound represented by Chemical Formula 1 may be synthesized according to a general synthetic method. Detailed synthesis procedures for the compounds of the present invention will be described in detail in the synthesis examples described below.
  • organic electroluminescent device comprising the compound represented by the formula (1) according to the present invention.
  • the organic electroluminescent device includes an anode, a cathode, and one or more organic material layers interposed between the anode and the cathode, and at least one of the one or more organic material layers.
  • a compound represented by the formula (1) includes a compound represented by the formula (1).
  • the compound may be used alone, or two or more may be used in combination.
  • the at least one organic material layer may be any one or more of a hole injection layer, a hole transport layer, a light emitting auxiliary layer, a light emitting layer, an electron transport layer and an electron injection layer, wherein at least one organic material layer may include a compound represented by Formula 1 have.
  • the organic material layer including the compound of Formula 1 is preferably a light emitting layer, an electron transport layer, a hole transport layer.
  • the light emitting layer of the organic electroluminescent device of the present invention may include a host material, and may include the compound of Formula 1 as the host material.
  • the light emitting layer of the organic electroluminescent device of the present invention may include a compound other than the compound of Formula 1 as a host.
  • the structure of the organic EL device of the present invention is not particularly limited, but may be a structure in which a substrate, an anode, a hole injection layer, a hole transport layer, a light emitting auxiliary layer, a light emitting layer, an electron transport layer, and a cathode are sequentially stacked.
  • the hole injection layer, the hole transport layer, the light emission auxiliary layer, the light emitting layer, the electron transport layer and the electron injection layer may include a compound represented by the formula (1), preferably a hole transport layer, electron blocking layer, light emission
  • the auxiliary layer may include a compound represented by Chemical Formula 1. Meanwhile, an electron injection layer may be further stacked on the electron transport layer.
  • the organic electroluminescent device of the present invention may have a structure in which an insulating layer or an adhesive layer is inserted between an electrode and an organic material layer interface.
  • the organic electroluminescent device of the present invention can be manufactured by forming an organic material layer and an electrode by materials and methods known in the art, except that at least one layer of the organic material layer includes the compound represented by Chemical Formula 1.
  • the organic material layer may be formed by a vacuum deposition method or a solution coating method.
  • the solution coating method include, but are not limited to, spin coating, dip coating, doctor blading, inkjet printing, or thermal transfer.
  • the substrate used in the manufacture of the organic EL device of the present invention is not particularly limited, but silicon wafers, quartz, glass plates, metal plates, plastic films, sheets, and the like may be used.
  • examples of the anode material include metals such as vanadium, chromium, copper, zinc and gold or alloys thereof; Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO: Al or SnO 2 : Sb; Conductive polymers such as polythiophene, poly (3-methylthiophene), poly [3,4- (ethylene-1,2-dioxy) thiophene] (PEDT), polypyrrole or polyaniline; And carbon black, but are not limited thereto.
  • metals such as vanadium, chromium, copper, zinc and gold or alloys thereof.
  • Metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), indium zinc oxide (IZO); Combinations of metals and oxides such as ZnO: Al or SnO 2 : Sb
  • Conductive polymers such as polythiophene, poly (3-methylthiophene
  • the negative electrode material may be a metal such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, or lead or an alloy thereof; And multilayer structure materials such as LiF / Al or LiO 2 / Al, and the like, but are not limited thereto.
  • the hole injection layer, the hole transport layer, the electron injection layer and the electron transport layer is not particularly limited, and conventional materials known in the art may be used.
  • 7.5 g of the target compound was obtained by the same procedure as in Synthesis Example 11, except that 3,3-dimethyl-2-phenyl-3,6-dihydropyrrolo [3,2-c] carbazole was used as the reactant. Got it.
  • 11 g of the target compound was obtained by the same procedure as in Synthesis Example 20, except that 3,3-dimethyl-2-phenyl-3,6-dihydropyrrolo [3,2-c] carbazole was used as the reaction product. .
  • 7.5 g of the target compound was obtained by the same procedure as in Synthesis Example 24, except that 3,3-dimethyl-2-phenyl-3,6-dihydropyrrolo [3,2-c] carbazole was used as the reactant. Got it.

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Abstract

La présente invention concerne un nouveau composé présentant d'excellentes capacités de photoémission et un dispositif électroluminescent organique le comprenant dans au moins une couche organique et ayant de ce fait une efficacité lumineuse, une tension d'excitation, une durée de vie et des qualités similaires, qui sont améliorées.
PCT/KR2016/008581 2015-08-04 2016-08-03 Composé organique photoémetteur et dispositif électroluminescent organique l'utilisant WO2017023125A1 (fr)

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KR102568928B1 (ko) * 2020-12-14 2023-08-22 주식회사 엘지화학 신규한 화합물 및 이를 포함하는 유기발광 소자
CN116157407A (zh) * 2020-12-17 2023-05-23 株式会社Lg化学 新化合物和包含其的有机发光器件
US20240109884A1 (en) * 2021-03-30 2024-04-04 Lg Chem, Ltd. Novel compound and organic light emitting device comprising the same
US20240147848A1 (en) * 2021-03-30 2024-05-02 Lg Chem, Ltd. Novel compound and organic light emitting device comprising the same
EP4254527A1 (fr) * 2021-04-05 2023-10-04 Lg Chem, Ltd. Dispositif électroluminescent organique
US20240138256A1 (en) * 2021-04-05 2024-04-25 Lg Chem, Ltd. Organic light emitting device

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